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CVE-2024-53851

Estado: AnalizadaMedia (6.5)—

Discourse is an open source platform for community discussion. In affected versions the endpoint for generating inline oneboxes for URLs wasn't enforcing limits on the number of URLs that it accepted, allowing a malicious user to inflict denial of service on some parts of the app. This vulnerability is only exploitable by authenticated users. This issue has been patched in the latest stable, beta and tests-passed versions of Discourse. Users are advised to upgrade. Users unable to upgrade should turn off the `enable inline onebox on all domains` site setting and remove all entries from the `allowed inline onebox domains` site setting.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Discourse — Discourse

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2024-53851",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-53851",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-02-04T21:40:40.799536Z"
        }
      }
    ],
    "cvssMetricV31": [
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        "type": "Secondary",
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          "baseScore": 4.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
      },
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        "source": "nvd@nist.gov",
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          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
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  "affected": [
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      "source": "security-advisories@github.com",
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        {
          "vendor": "discourse",
          "product": "discourse",
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            {
              "status": "affected",
              "version": "stable: <= 3.3.2"
            },
            {
              "status": "affected",
              "version": "beta: <= 3.4.0.beta3"
            },
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              "status": "affected",
              "version": "tests-passed: <= 3.4.0.beta3"
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  "published": "2025-02-04T22:15:40.490",
  "references": [
    {
      "url": "https://github.com/discourse/discourse/commit/416ec83ae57924d721e6e374f4cda78bd77a4599",
      "tags": [
        "Patch"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/discourse/discourse/security/advisories/GHSA-49rv-574x-wgpc",
      "tags": [
        "Third Party Advisory"
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      "source": "security-advisories@github.com"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
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          "lang": "en",
          "value": "CWE-400"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Discourse is an open source platform for community discussion. In affected versions the endpoint for generating inline oneboxes for URLs wasn't enforcing limits on the number of URLs that it accepted, allowing a malicious user to inflict denial of service on some parts of the app. This vulnerability is only exploitable by authenticated users. This issue has been patched in the latest stable, beta and tests-passed versions of Discourse. Users are advised to upgrade. Users unable to upgrade should turn off the `enable inline onebox on all domains` site setting and remove all entries from the `allowed inline onebox domains` site setting."
    },
    {
      "lang": "es",
      "value": "Discourse es una plataforma de código abierto para debates comunitarios. En las versiones afectadas, el endpoint para generar casillas de verificación en línea para URL no imponía límites en la cantidad de URL que aceptaba, lo que permitía a un usuario malintencionado infligir una denegación de servicio en algunas partes de la aplicación. Esta vulnerabilidad solo la pueden explotar los usuarios autenticados. Este problema se ha corregido en las últimas versiones estables, beta y de pruebas aprobadas de Discourse. Se recomienda a los usuarios que actualicen la versión. Los usuarios que no puedan actualizar la versión deben desactivar la configuración del sitio `habilitar casillas de verificación en línea en todos los dominios` y eliminar todas las entradas de la configuración del sitio `dominios de casillas de verificación en línea permitidos`."
    }
  ],
  "lastModified": "2026-06-17T08:09:25.110",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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}